Riveting machine



Sept. 24, 1929. F, DAVls ET AL 1,729,247

4RIVETINGr MACHINE Filed Jan. 27, '1928 2 Sheets-Sheet 1v BY Q7/M ATTORNEY Sept. 24, 1929. F. DAVIS ETAL RIVETING MACHINE Filed Ja. 27, 1928 2 Sheets-Sheer Patented Sept. 24, 1929 *UNHTED ST'ES saveur orifice FRANK DAVL'S, OF BRGOKLYN, NEW' YORK, AND ANTON GROTEUS, OF HOBOKEN,

NEW

Application filed January fr?, 112228.

The presentinvcntion relates, generally, to machines tor punching holes at lap se .ns ot metal parts to be joined and for riveting lapped joints. rl`he invention, more parti@ ularly, relates to machines tor inserting rivets tl'irongh lapixed metal parts and headover the rivets. The invention further rel ates te riveting machines having apparatus tor carrying a plurality of rivets in position to be inserted through metal amL or presenting them successively to inserting apparatus. The invention also relates to a method of insertin ri vets through sheet metal.

An object of this invention is to provide a machine vfor punching a hole in a lapped she t metal seam and i .sorting a rivet, simultaneously, the rivet to be inserted being used as a. part ot the punching apparatus; and a further object is to provide such a machine wii 1 means for inserting the rivet and heading the inserted rivet. in one operation.

Another object et the invention is to provide means for hohiling aplurality of rivets in position to be successively presented and held during a punching and riveting action.

Other objects and advantages of the invention will appear 'troni the following` description ot' an illustrative embodiment of the inventiom t'r m the desciption of the method of' operation thereoit. and from the drawings; and the invention also consists in the methods,

devices and combinations and arrangementset parts forth in tl e, appended claims.

rl"hroughout the drawings similar reiference characters iiulicate corresponding parts.

vF' irc 1 is a trout elcvatioi'i view oi a machine embodying the invention;

Figure a side elevation view of the saine machine;

-Figure a vertical sectional view in part of the machine of Figure 1, enlarged to show fhitails oi? constriu'tiou, an d with a hole punching part and riveting part in raised position liligure 4 i s a view sin-'iiiar to that oit Figure l5 but with the hole punching part down in a punching position;

an enlarged view, in part, of a "in along the tCH'NE Serial No. 249,826.

line 6, 6 of Figure 5 and looking in the direction of the arrows; and Y Figure 7 is a plan view'showing` details of a. controlling means.

the drawings the base 1 supports thevertical. trame 2 which disposes above said base 1 the circular guide members 4, 6 and 8 which are vertically aligned one above vthe other. Slidable vertically insaid guide'menr bers 4, and 8 is the steel tube lO which has a length greater than the eXtreme distance between .said guide members 4 and 8 and which at its lower en'd carries the annular female puinfhing die 12. At' its upper end, above said guide member 4, said tube 10 carries the annular flange 14; and between said guide member 4 and said flange 14 said tube 10 carries` lined thereto the weight 13 which is in the form ot a cylindrical block mounted on and about the tube 10. A pair of tension springs 1G, 1G connecting said guide member 8 and said weight 13, serve as actuating means tending to move said tube 10 and the female punching die 12v downwardly.

In said tube 10 is sldably mounted the rod 20, the lower end 22 of which is formed as a riveting hammer. Above said flange 14, said rod 2O has lixed thereto a member 24 which at its upper end is irusto-Conical and tapers downwardly from said rod 2O for a ldistance and then projects downwardly in a cylindrical portion at the lower end. Said member 24 at its lower face has formed there in a counter-bore 26 which is of such depth and diameter as to receive said 'flange 14 thereinto. A pair of tension springs 28, 28 are attached at theirupper ends to the pins 30, BOprojectingtromthefront and the bach, respec tively, oii sai d member 24, an dsaid springs are attached at their lower ends to said guide member 4., said springs serve as actuating means tending to move said rod 20 and hammer 22 downwardly. At its upper end said rod 2O carries an upwardly projecting handle member 32. Above said guide member 4 and to the rear thereof said frame 2 carries, pivoted thereto, a. pair of arms 34, 34 which project forwardly one on each sid-eef said tube 10a Said arms 34 are of steeland tend toward each other, and are adapted to move on their pivot fronia position above said member 24 downwardly over the conical portion of the latter, whereby they will be spaced apart to permit the movement thereof downwardly past and below the cylindrical portion of member 24, below which they will move toward each other under the lower end of sai-d member 24 in a manner and for a purpose hereinafter .more fully described. Below said arms 34 there is fixed to said frame 2 a bar 36 which exends outwardly and then upwardly between said arms 34 intermediate said frame 2 and said tube 10. Said bar 36 is of a width substantially the same as the diameter of said tube and carries at its upper end the symmetrical cam member 38 whichhas a lower portion 40 which is of a width greater than the diameter of said flange 14 but smaller than the diameter of the cylindrical portion of sai-d member 24. At its upper end said cam portion 40 merges into a cam portion 42 whose width is greater than the diameter of the cylindrical portion of said member 24. Between said frame 2 and said bar 30 a transverse rod 44 extends through said arms 34 and on the outer en-ds of rod 44 are mounted the compression springs 40, 46 which, bearing at their outer ends against the nuts 48, 48 on said rod 44, and at their inner ends against the outer sides of the respective ones of said arms 34, 34, tend to move said arms 34, 34 toward each other. Between rod 44 and. said frame 2 sai-d arms 34, 34 carry, pivoted thereto, the connecting rods 50, 50 which extend downwardly therefrom. At their lower ends said connecting rods 50, 50 are pivotally connected to the crank arms 52, 52 which extend laterally from and are lixed to the shaft 54 which is journaled in said frame 2; said connectingrods 50, 50 and crank arms 52, 52, beingv arranged in pairs one on cach side of said frame 2. Fixed to said shaft 54 at one end thereof is the foot lever 5G to which extends downwardly alongside said base 1,and which at its lower end carries lthe foot pedal 58. At the opposite end of said shaft 54 mounted the upwardly proliectingarm 00, which at its upper end carries the counter-weight (52; said arm (S0 being' set on said shaft so that in the normal position oi" said foot lever 50 said weight 62 is behind the axis of said journal 54, and is forward of this axis in the operated position of said foot lever 58. Above said foot pedal 5S said base 1 carries a guide (34 which extends alongl the direction of movement of said foot lever 50, and serves as a lateral guide therefor. Below said guide 64, said base 1 carries leaf spring G6 which extends along the direction of movement of said lever 56, and is adapted to bear downwardly against a pin 68 fixed to said lever 56 and projecting` inwardly therefrom. Said spring;` 0G is lixed at a point to the rear of said base 1 and has its forward end free. At its lower side said spring;` (36 carries the stop member T2, which is inclined downwardly and baclrwardly to permit movement of said pin 08 past the same against the yielding pressure of said spring 6G, but at its opposite sine inclined at an angle downwardly to catch and hold said pin 68 to restrain retractive movement of said lever 56 unless said spring G0 is pulled upwardly to move said stop 7 2 from the pin engaging position. The function of said stop 7 2 is hereinafter more fully set forth.

Said base 1, together with the support member 80, carries a bed plate 82 which extends longitudinally from a point below d tube 10 and rod 20. rt its outer end Yd plate 82 carries a pair of clamp members 84, 8G which carry, in removably clamped relation, a horizontal mandrel 88 which extends therefrom in spaced relation above said plate 82, to a point below and beyond said tube 10 and rod 20. Along` the upper side olf said mandrel S8 is a rectangular channel or slot 00 which extends from under the tube 10 in one direction to a point near said clamp 8G and in the other direction to the end of mandrel 88. Positioned in said channel 90 is a rectangular sheath 02 which is pivoted to said mandrel 88 at the end near said clamp 80. rlhis pivotal connection is made by means of a link 04 which has one end inserted into the end of sheath 92, and either fixed thereto or slidably removable therefrom, and has its other end pivoted to mandrel 88 by the pin 9o. Said sheath forms bottom and side members and has spaced apart longitudinal rims 98, 98 which extend along the top thereof from one end to the other. The distance between said rims 98, 98 is greater than the diameter of rivet head which the machine intended to use. Directly below said rod 20 said sheath has a hole 100 formed through its bottom, which hole is preferably of a diameter greater than that of the head of a rivet to be handled by the machine.

Slidably fittingl in said sheath 02, and held therein by said rims 98, 98, the rectangular rod 102 which has formed therein a plurality of spaced apart vertical holes 10ft, 104, each of a. diameter to hold a rivet 'v ically therein with its head in easy slid ing it. Beneath said rod 20said mandrel S8 supports a pin 100, which extends upwardly from the bettom of said channel 90 and through said hole 100 in the bottom of said sheath 92 for a short distance. This pin 100 serves as an abutment or support adapted to hold a rivet in opposition to the 'female die 12. adjacent to said pin 106 is a pin 108 which ext nds throlmjh a hole 110 in the bottom of mid channel 90, and has its head 112 in the countcrbore 114 which extends from the bottom side of mandrel S8 to said hole 110. compression spring,y 110 is positioned in said counter-bore 114, and held in compre. sled relation against said head 114 by the set screw 118, -tends to hold said pin v108 in the uppermost position. r. aid spring 118, throughengagement with the bottom of said sheath 92 by said pin 108,*tends tohold said bar or rod 102 above the top end of said pin 106.

In the use and operation'of the apparatus of the invention for riveting together lapped edges of sheet metal, the said rod 102 is slid into said sheath 92 and rivets 120,120 are mounted head downwardly'in eachvof said ho-les 104, 104, one of said holes 104l being aligned over said pin 106. A sheet iron pipe 122 can then be mounted over said-mandrel 88 with its longitudinal edges 124, 126 in lapped relation. In this stage said lever 56 and foot pedal 58 are at an intermediate position in their movement with said shaft 54, and areheld in such position by the spring 66 and catch 72, which latter engages said pinl 68. In this position the bars 84, 34 have been raised to a point iust below said cam member 38 to raise tube 10 and rod 20 to provide a working space thereunder onsaid mandrel 88, andlsaid flange 14 isl completely within said counter bore 26, and the forward ends of said bars 84, 34 engage the lower edge of said member 24 and the lower face of said flange 14 to support said tube 10 and rod20 in partially raised position. The next step is to press down the outer lend of the work over said bar 102 to bring the lapped edges 124, 126 down against the upwardly projecting end of a rivet 120 directly below said tube 10 and rod 20, the rivet being held from movement with the ybar 102 by the pin 106. The foot pedal 58 is now moved further backwardly to bring said bars 34, 34 into operative engagement with the portion of said cam member 38, whereby said bars 34, 34 are moved apart out. of supporting engagement with said flange 14, which is thereby released.,

Said springs 16, 16 w'll then move said tube 10 downwardly with a. sudden and 'sharp movement to bring said female punching die 12 downwardly against said lapped edges 124, 126 thereby causing said rivet Y120 beneath tube 10, as supported by the fixed pin 106, to be pushed upwardly through said lapped edges 124, 126. The movement of said foot pedal 58 is continued, preferably in one motion, to cause said bars 34, 34 to pass over the movement said bars 34,' 34.- are drawn downwardly over the conical portion of said member 24 and below the lower endof said member 24,7whereupon said bars 34, 34 will be moved toward each other by said springsg46, 46 beneath said member 24 and also beneath said flange 14. L Said bar 102'is then released from downward pressure whereby said spring 116 willpress said sheath y92 to clear the lower end of said bar 102 from the upper end of said pin 106.v Said foot lever 58 is then moved back runtil said pin68 passed beyond said stop 72 to raise said die 22 and hammer 12 from the work; and spring 66, through engagement -ofv pin 68 and stop 72, will hold lever 56 at this position. The work is then moved outwardly on mandrel 88 toward the next rivetingpoint. Bar 102 is also moved l outwardly in sheath ,92 `until the hole 104 with which pin 106 has been in engagement Vhas moved from over pin 106 and pressure downwardly is applied to the work and bar 102 and the outward movement thereof con-- tinued until the next hole 104 comes in engagement with said pin 106, whereupon the downward pressure is used to move the lapped edges 124, 126into engagement with the upper' end of the rivet 120 in this next hole`104. The foot lever 58 is again moved backwardly as before to successively release said lever' 10 and rod 20 to cause this next rivet to be .inserted through the lapped edges and to head the rivet thereon. This sequence of operation is continued for as many rivets as are desired to be insertedand riveted in place.

le claim:

1. In combination in a .punching and rivet-`v ing machine, a female punching `die and ia rivetinghammer both movable along a given line into and out of operative position ;l and a workholder in operative relation to said. female die and hammer; said workholder comprising a longitudinal sheath having openings through opposite walls thereof aligned with said female die and hammer; a bar in said sheath having rivet carrying openings therethrough and movable longitu-` dinally in said sheathto bring its said oponings severally into registry with saidk openings in said sheath; a pin on the side of said sheath opposite from said female die and hammer and aligned with said openings in said sheath, said pin being adapted to support a rivet in opposition to the effective strokes of said female die and hammer.

2. In combination in a punching and riveting machine, a female punching die and a riveting hammer both movable along a given line into and out of operative position; and a workholder in operative relation to said female die and hammer; said workholder comprising a longitudinal mandrel aligned across the line of movement of said female die and hammer; a longitudinal sheath onfsaid anvil on the side facing saidfemaledie and hammer, said sheath having openings through opposite Walls thereof aligned with said female die and hammer; a bar in said sheath havingl rivet carrying openings therethrough-and being` longitudinally movable in said sheath to bring its said rivet carrying openings severally into registry iv'th said openings in said sheath; a pin mounted on said mandrel opposite said hammer and female die and adapted to support a rivet in opposition to the effective strolres of said female die and hammer; said sheath being movable toward and from said pin to bring said bar out of and into engagement with said pin; said female die having a central opening therein adapted to press around a rivet mounted on said pin to cause said rivet to punch a hole through sheet metal mounted between the rivet and female die.

A Workholder for rivet-ing machines and the like, comprising` a mandrel having a longitudinal slot therein extending to a given end thereof, a pin extending up from the bo ttom of said slot near said given end, a longitudinal shea-th in said slot pivoted to said mandrel at the end opposite to said given end of said mandrel for movement up and down in said slot, said sheath havn y ing through the Wall adjacent tle bottom of said slot and into which said pin can extend and having a second opening through the uall. opposite said first opening, a bar in said sheath longitudinally slidable therein and having openings therethrough which can be brought severally into registry With said openings in said sheath; said pin being of a length to extend to near the said second opening in said sheath When the latter is aga-inst the bottom of said slot, and said sheath and bar being movable on the pivot of said sheath to move the bottom of said bar over thc end of's'aid pin.

a. A Workholder for riveting machines and thel lil-ze, comprising a mandrel having a longitudinal slot therein extending to a given end thereof, a pin extending up from the bottom of said slot near said given end, a longitudinal sheath in said slot pivoted to said mandrel at the end opposite to said given end of said mandrel for movement up and down in said slot, said sheath having an opening through its Wall adjacent the bottom of said slot and into which said pin can extend and having a second opening through the Wall opposite said lirst opening, a bar in said sheath longitudinally slidable 'therein and having openings therethrough which can be brought severally int-o registry with said openings in said sheath; said pin being of a length to extend to near the end of said second opening in said sheath When the latter is against the bottom of said slot, and said sheath and bar being movable on the pivot of said sheath to move the bottom of said bar over the end of said pin and means tending to hold said sheath in spaced apart relation with respect to the bottom of said slot. t

5. In combination in a punching and riveting machine, a female punching die and a riveting hammer both movable along a given line into and out of operative position; and a Workholder in operative relation to said die and hammer; said Workholder comprising a longitudinal sheath having openings through opposite Walls thereof aligned with said die and hammer a bar in said sheath having rivet carrying openings therethrough and movable longitudinally in said sheath to bring its said openings severally into registry With said openings in said sheath; a pin on the opposite side of said sheath from said die and hammer and aligned with said openings in said sheath, said pin being adapted to support a rivet in opposition to the effective strokes of said female die and hammer; means for raising said die and hammer together from said mandrel, means tending to move said die and said hammer toward said mandrel and means for successively releasing said die and hammer for movement to said mandrel.

6. In combination in a punching and riveting machine, a female punching die and a rivetino' hammer both movable along a given line into and out of operative position; and a Workholder in operative relation to said die and hammer; said workholder comprising a longitudinal sheath having openings through opposite Walls thereof aligned With said die and hammer; a bar in said sheath having rivet carrying openings therethrough and movable longitudinally in said sheath to bring its said openings severally into registry with said openings in said sheath; a pin on the opposite side of said sheath from said die and hammer and aligned with said openings in said sheath, said pin being adapted to support a rivet in opposition to the effective strokes of said female die and hammer; means for raising said die and hammer together from said mandrel, separate means tending to move said die and said hammer toward said mandrel; and means for successively releasing said die and hammer for movement to said mandrel.

7 In combination in a punching' and riveting machine, a female punching die and a riveting hammer both movable along a given line into and out of operative position; and a Workholder in operative relation to said die and hammer; said Workholder comprising a longitudinal sheath having openings through opposite Walls thereof aligned with said die and hammer; a bar in said sheath having rivet carrying openings therethrough and movable longitudinally in said sheath to bring its said openings severally into registry with. said openings in said sheath; a pin on the opposite side of said sheath from said die and hammer and aligned With said openings in said sheath, said pin being adapted to support a rivet in opposition to the effective strokes of said female die and hammer; means for raising said die and hammer together from said mandrel, means tending to move die and hammer toward said mandrel; and means for successively releasing said die and hammer for movement to said mandrel; first said means being adapted to hold said die and hammer in the raised position.

8. In combination in a punching and riveting machine, a female punching die and a riveting hammer both movable along a given line into and out of operative position; and a workholder in operative relation to said die and hammer; said workholder comprising a longitudinal mandrel aligned across the line of movement of said die and hammer; a longitudinal sheath on said anvil on the side facing said die and hammer, said sheathhaving openings through opposite walls there-of aligned with said die and hammer; a bar in said sheath having rivet carrying openings therethrough and being longitudinally movable in said sheath to bring its said rivet carrying openings severally into registry with said openings in said sheath; a pin mounted on said mandrel opposite said hammer and die and adapted to support a rivet in opposition to the effective strokes of said female die and hammer; said sheath being movable toward and from said pin out of and into engagement with openings in said bar; means for raising' said die and hammer together from said mandrel, means tending to move said die and said hammer downwardly against said mandrel; and means for successively releasing said die and hammer for movement toward said mandrel.

9. In a punching and riveting machine having an axially movable hollow punch tube with a circular punch on the end thereof and a riveting hammer movable longitudinally therein; in combination; actuatable means to raise said punch and hammer preparatory to punching work and heading over a rivet; spring means for moving said punch and hammer in operative direction; and means for successively releasing said punch and hammer for working movement.

10. In a punching and riveting machine, an axially movable tubular punch adapted to push sheet metal over a rivet or other projection to form an opening therethrough to receive the latter; a hammer rod mounted for movement through said punch along the axis thereof; said punch having a lifting abutment at its upper end; said hammer rod having a lifting abutment at its upper end which is recessed to receive the lifting abutment of said punch; means tending to move said punch and said hammer rod in operative direction; lifting means engageable with said lifting abutment of said punch to raise the latter and in turn raise said hammer rod preparatory to operative strokes thereof;

means for actuating said lifting means; yieldable means to hold said lifting means in engagement with said lifting abutments; and means in the operative path of movement of said lifting means adapted when engaged by the latter to disengage the same successively from said punch and hammer rod lifting abutments to successively release them for their operative strokes.

11. In a punching and riveting machine, an axially movable hollow punch adapted to push sheet metal over a rivet or other projection to form an opening therethrough to receive the latter, a hammer rod mounted for movement through said punch along the axis thereof; a lifting projection on the upper end of said punch; a lifting projection on the upper end of said hammer rod above the lifting projection of said punch; spring means operative to move said punch and said hammer rod in operative downward direction; vertically oscillatable lifting means engageable with said lifting projection of said punch to raise the latter' and in turn said hammer rod preparatory to operative strokes thereof; said lifting means being also capable of lateral movement; means for yieldably holding said lifting means laterally moved toward said punch and hammer rod so as to engage said lifting projections thereof; means in the path of upward movement of said lifting means to laterally move and outwardly displace the latter successively, first, from engagement with said lifting projection of said punch, and thereafter' from engagement with said lifting projection of said hammer rod, to successively release said punch and hammer rod subject to operation by their said spring moving means; said lifting projection on said hammer rod having a sloping surface at its upper end to guide said lifting means; when retracted to initial position, around said lifting projections and into returned lifting relation thereto; and means for operating said lifting means.

12. In a punching and riveting machine as defined in claim ll, a weight on said punch to serve as an auxiliary to the spring operating means thereof.

In testimony, that we claim the invention les set forth above we have hereunto set our hands.

FRANK DAVIS. ANTON GROTHUS. 

